JPH04310995A - Liquid crystal display controller - Google Patents
Liquid crystal display controllerInfo
- Publication number
- JPH04310995A JPH04310995A JP3076458A JP7645891A JPH04310995A JP H04310995 A JPH04310995 A JP H04310995A JP 3076458 A JP3076458 A JP 3076458A JP 7645891 A JP7645891 A JP 7645891A JP H04310995 A JPH04310995 A JP H04310995A
- Authority
- JP
- Japan
- Prior art keywords
- display
- liquid crystal
- signal
- coordinate detection
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 59
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 32
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Position Input By Displaying (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、表示用電極を座標位置
の検出にも用いる液晶表示装置を制御する液晶表示制御
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display control device for controlling a liquid crystal display device that also uses display electrodes to detect coordinate positions.
【０００２】0002
【従来の技術】図３は、例えばＩＥＥＥに掲載された論
文中で開示された従来の液晶表示制御装置の構成を示す
ブロック図で、図において、１は液晶表示装置、２は表
示信号生成回路、３は液晶表示装置１の電極を用いて座
標を検出する座標検出信号生成回路、４は信号切替手段
で、表示信号生成回路２からの信号と座標検出信号生成
回路３からの信号の切り替えを行う。５は信号切替手段
４の動作信号を生成する切替信号生成回路、６は１画面
（フレーム）表示終了を検出する１画面表示終了検出手
段、７は液晶表示装置１からの座標検出信号を読み取る
座標検出信号読取手段、８は座標検出信号読取回路７で
読み取った検出信号を処理する読取信号処理回路、９は
装置全体を制御するＣＰＵ等の制御装置を示す。2. Description of the Related Art FIG. 3 is a block diagram showing the configuration of a conventional liquid crystal display control device disclosed in a paper published in IEEE, for example. In the figure, 1 is a liquid crystal display device, and 2 is a display signal generation circuit. , 3 is a coordinate detection signal generation circuit that detects coordinates using the electrodes of the liquid crystal display device 1, and 4 is a signal switching means that switches between the signal from the display signal generation circuit 2 and the signal from the coordinate detection signal generation circuit 3. conduct. Reference numeral 5 denotes a switching signal generation circuit that generates an operation signal for the signal switching means 4, 6 a single screen display end detection means that detects the end of display of one screen (frame), and 7 a coordinate system for reading the coordinate detection signal from the liquid crystal display device 1. Detection signal reading means; 8 is a read signal processing circuit that processes the detection signal read by the coordinate detection signal reading circuit 7; 9 is a control device such as a CPU that controls the entire apparatus.
【０００３】次に動作について説明する。図４に示すよ
うに、液晶表示装置１への表示動作は、１フレーム通常
７０Ｈｚのサイクルで行われており、１フレームサイク
ルの始点では、信号切替手段４が液晶表示装置１と表示
信号生成回路２とを接続しており、この表示信号生成回
路２からの表示信号により、順次液晶表示装置１に表示
が行われている。Next, the operation will be explained. As shown in FIG. 4, the display operation on the liquid crystal display device 1 is normally performed in a cycle of 70 Hz for one frame, and at the starting point of one frame cycle, the signal switching means 4 switches between the liquid crystal display device 1 and the display signal generation circuit. 2 are connected to each other, and display is sequentially performed on the liquid crystal display device 1 by display signals from the display signal generation circuit 2.
【０００４】そして、１画面（１フレーム）の表示が終
了すると、１画面表示終了検出手段６が終了を検出し、
切替信号生成回路５により切替信号を信号切替手段４へ
送り、信号切替手段４を動作させて今度は液晶表示装置
１と座標検出信号生成回路３とを接続する。[0004] When the display of one screen (one frame) is completed, the one-screen display end detection means 6 detects the end,
The switching signal generation circuit 5 sends a switching signal to the signal switching means 4, and the signal switching means 4 is operated to connect the liquid crystal display device 1 and the coordinate detection signal generation circuit 3.
【０００５】そして、座標検出信号生成回路３で生成さ
れた座標検出信号が液晶表示装置１へ送出され、座標検
出信号読取手段７が液晶表示装置１の任意の位置にある
時に、当該座標位置を示す座標検出信号を検出して読取
信号処理回路８に送出し、座標検出信号読取手段７が液
晶表示装置１上のどの座標位置にあるかを検出する。座
標検出信号読取手段７の座標位置の検出が終了すると、
読取信号処理回路８が切替信号生成回路５へその旨を通
知し、切替信号生成回路５が切替信号を生成して信号切
替手段４へ送り、信号切替手段４が動作して再び液晶表
示装置１と表示信号生成回路２とを接続し、次の１フレ
ームの表示が行われる。以降、この動作が繰り返し行わ
れ、フレームごとに表示が行われる。[0005]The coordinate detection signal generated by the coordinate detection signal generation circuit 3 is sent to the liquid crystal display device 1, and when the coordinate detection signal reading means 7 is at an arbitrary position on the liquid crystal display device 1, the coordinate position is read. The coordinate detection signal shown is detected and sent to the read signal processing circuit 8, and it is detected at which coordinate position on the liquid crystal display device 1 the coordinate detection signal reading means 7 is located. When the detection of the coordinate position by the coordinate detection signal reading means 7 is completed,
The read signal processing circuit 8 notifies the switching signal generation circuit 5 of this fact, and the switching signal generation circuit 5 generates a switching signal and sends it to the signal switching means 4, and the signal switching means 4 operates to switch the liquid crystal display device 1 again. and the display signal generation circuit 2 are connected, and the next frame is displayed. Thereafter, this operation is repeated and display is performed frame by frame.
【０００６】[0006]
【発明が解決しようとする課題】解決しようとする問題
点は、従来の液晶表示制御装置では上述のように動作す
るので、１フレームサイクルに１点の座標、すなわち１
秒間に７０点の座標位置しか検出できず、このことは例
えば手書きで曲線を表示しようとする場合に、手書きの
スピードに表示が追い付けず、表示結果が飛び飛びの点
で表示されてしまう等の現象が生じ、マンマシンインタ
フェースとして使いにくいという問題点があった。The problem to be solved is that since the conventional liquid crystal display control device operates as described above, the coordinates of one point in one frame cycle, that is, one
Only 70 coordinate positions can be detected per second, and this means that, for example, when trying to display a curved line by hand, the display cannot keep up with the speed of the handwriting, resulting in the display result being displayed as discrete points. This caused the problem that it was difficult to use as a man-machine interface.
【０００７】本発明はかかる課題を解決するためになさ
れたもので、速いスピードで入力が行われた場合でも追
従して表示できる液晶表示制御装置を得ることを目的と
している。なお、表示装置における部分書換えを目的と
する先行技術として、特開平２−１３１２８６号公報「
表示装置」に開示された発明がある。The present invention has been made to solve this problem, and an object of the present invention is to provide a liquid crystal display control device that can follow and display even when input is performed at high speed. In addition, as a prior art for the purpose of partial rewriting in a display device, Japanese Patent Application Laid-Open No. 2-131286 “
There is an invention disclosed in "Display Device".
【０００８】[0008]
【課題を解決するための手段】本発明にかかる液晶表示
制御装置は、１分割表示終了検出手段を設け、１画面を
表示する１フレーム期間中、１分割表示が終了するごと
に座標検出期間を設けたことを最も主要な特徴としてい
る。[Means for Solving the Problems] A liquid crystal display control device according to the present invention is provided with a one-division display end detection means, and detects a coordinate detection period every time one division display ends during one frame period in which one screen is displayed. The most important feature is that
【０００９】[0009]
【作用】本発明の液晶表示制御装置においては、１フレ
ーム当りの検出できる座標の数を増やすことができ、手
書きなどの速いスピートの入力に対しても正確に追従し
て表示することが可能となる。[Operation] In the liquid crystal display control device of the present invention, the number of coordinates that can be detected per frame can be increased, and even fast-speed input such as handwriting can be accurately tracked and displayed. Become.
【００１０】0010
【実施例】以下、本発明の一実施例を図面を用いて説明
する。図１は本発明の一実施例を示すブロック図で、図
において、１は液晶表示装置、２は表示信号生成回路、
３は液晶表示装置１の電極を用いて座標を検出する座標
検出信号生成回路、４は信号切替手段で、表示信号生成
回路２からの信号と座標検出信号生成回路３からの信号
の切り替えを行う。５は信号切替手段４の動作信号を生
成する切替信号生成回路、７は液晶表示装置１からの座
標検出信号を読み取る座標検出信号読取手段、８は座標
検出信号読取手段７で読み取った検出信号を処理する読
取信号処理回路、９は装置全体を制御するＣＰＵ等の制
御装置、１０は本実施例における１分割表示終了を検出
する１分割表示終了検出手段である。なお、各部の構成
は既に良く知られたもの、或は公知の技術を応用するこ
とで容易に実現でき、ここではその説明は省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which 1 is a liquid crystal display device, 2 is a display signal generation circuit,
3 is a coordinate detection signal generation circuit that detects coordinates using the electrodes of the liquid crystal display device 1; 4 is a signal switching means that switches between the signal from the display signal generation circuit 2 and the signal from the coordinate detection signal generation circuit 3; . Reference numeral 5 denotes a switching signal generation circuit that generates an operation signal for the signal switching means 4, 7 a coordinate detection signal reading means for reading the coordinate detection signal from the liquid crystal display device 1, and 8 a detection signal read by the coordinate detection signal reading means 7. A reading signal processing circuit for processing, 9 a control device such as a CPU that controls the entire apparatus, and 10 a 1-division display end detection means for detecting the end of 1-division display in this embodiment. It should be noted that the configuration of each part is already well known or can be easily realized by applying known technology, so the explanation thereof will be omitted here.
【００１１】次に動作について説明する。図２に示すよ
うに、液晶表示装置１への表示動作は、１フレーム通常
７０Ｈｚのサイクルで行われており、本実施例ではこの
１フレームを時分割により適当な数に分割して表示する
ように構成されている。そして、１フレームサイクルの
始点では、信号切替手段４が液晶表示装置１と表示信号
生成回路２とを接続しており、この表示信号生成回路２
からの表示信号により、順次液晶表示装置１に表示が行
われる。Next, the operation will be explained. As shown in FIG. 2, the display operation on the liquid crystal display device 1 is normally performed in one frame at a cycle of 70 Hz, and in this embodiment, this one frame is divided into an appropriate number of parts by time division and displayed. It is composed of At the starting point of one frame cycle, the signal switching means 4 connects the liquid crystal display device 1 and the display signal generation circuit 2.
Display signals are sequentially displayed on the liquid crystal display device 1 based on the display signals from the display signals.
【００１２】そして、１画面（１フレーム）中で１分割
の表示が終了すると、１分割表示終了検出手段１０がそ
れを検出し、切替信号生成回路５にこれを通知して信号
切替手段４をアクセスして液晶表示装置１と座標検出信
号生成回路３とを接続する。そして、座標検出信号生成
回路３から座標検出信号が液晶表示装置１へ送出され、
座標検出信号読取手段７が液晶表示装置１の任意の位置
にある時に、当該座標位置を示す座標検出信号を検出し
て読取信号処理回路８に送出し、座標検出信号読取手段
７が液晶表示装置１上のどの座標位置にあるかを検出す
る。座標検出信号読取手段７の座標位置の検出が終了す
ると、読取信号処理回路８が切替信号生成回路５へその
旨を通知し、信号切替手段４をアクセスして再び液晶表
示装置１と表示信号生成回路２とを接続し、次の１分割
の表示が行われる。以降、この動作が繰り返し行われ、
１フレーム（１画面）を表示する間に、表示画面を分割
した回数だけ座標の検出が行われ、検出した座標に追随
して表示が行われる。When the display of one division in one screen (one frame) ends, the one division display end detection means 10 detects this, notifies the switching signal generation circuit 5 of this, and switches the signal switching means 4. access and connect the liquid crystal display device 1 and the coordinate detection signal generation circuit 3. Then, the coordinate detection signal is sent from the coordinate detection signal generation circuit 3 to the liquid crystal display device 1.
When the coordinate detection signal reading means 7 is at an arbitrary position on the liquid crystal display device 1, it detects a coordinate detection signal indicating the coordinate position and sends it to the read signal processing circuit 8. Detect which coordinate position on 1. When the detection of the coordinate position of the coordinate detection signal reading means 7 is completed, the read signal processing circuit 8 notifies the switching signal generation circuit 5 to that effect, accesses the signal switching means 4, and starts working with the liquid crystal display device 1 again to generate display signals. The circuit 2 is connected to display the next one division. After that, this operation is repeated,
While displaying one frame (one screen), coordinates are detected as many times as the display screen is divided, and display is performed following the detected coordinates.
【００１３】なお上記実施例では、１フレームを時分割
して座標検出期間を多く設け、１フレーム中の検出座標
の数を増やすこととしたが、表示信号と座標検出信号と
を周波数分割して、液晶表示と座標検出とを同時に行わ
せるようにしても良い。In the above embodiment, one frame is time-divided to provide many coordinate detection periods to increase the number of detected coordinates in one frame. However, the display signal and the coordinate detection signal are frequency-divided. , liquid crystal display and coordinate detection may be performed simultaneously.
【００１４】[0014]
【発明の効果】以上説明したように本発明の液晶表示制
御装置は、１フレーム当りの検出できる座標の数を増や
すことができ、手書きなどの速いスピートの入力に対し
ても十分な座標データが得られ、追従性の良い描画が行
えるという利点がある。Effects of the Invention As explained above, the liquid crystal display control device of the present invention can increase the number of coordinates that can be detected per frame, and can provide sufficient coordinate data even for fast-speed input such as handwriting. This has the advantage that drawing can be performed with good followability.
【図面の簡単な説明】[Brief explanation of drawings]
【図１】本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図２】本発明の一実施例の動作を示すタイムチャート
図である。FIG. 2 is a time chart diagram showing the operation of an embodiment of the present invention.
【図３】従来の液晶表示制御装置の構成を示すブロック
図である。FIG. 3 is a block diagram showing the configuration of a conventional liquid crystal display control device.
【図４】従来の装置の動作を示すタイムチャート図であ
る。FIG. 4 is a time chart diagram showing the operation of a conventional device.
１ 液晶表示装置 ２ 表示信号生成回路 ３ 座標検出信号生成回路 ４ 信号切替手段 ５ 切替信号生成回路 ７ 座標検出信号読取手段 ８ 読取信号処理回路 ９ 制御装置 １０ １分割表示終了検出手段 1. Liquid crystal display device 2 Display signal generation circuit 3 Coordinate detection signal generation circuit 4 Signal switching means 5 Switching signal generation circuit 7 Coordinate detection signal reading means 8 Read signal processing circuit 9 Control device 10 1-split display end detection means
Claims (2)
手段と信号切替手段とを有し、上記表示信号生成手段か
らの表示信号と上記座標検出信号生成手段からの座標検
出信号とを上記信号切替手段で適宜切り替えながら、表
示用電極を座標位置の検出にも用いる液晶表示装置へ送
り、座標検出信号で検出された座標位置に表示信号で送
られてくる内容を描画する液晶表示制御装置において、
時分割により１フレームを複数に分割し複数の分割表示
期間を設ける手段、各分割表示期間の終了を検出する分
割表示終了検出手段を備え、各分割表示期間終了ごとに
上記信号切替手段を切り替えて座標検出信号を上記液晶
表示装置へ送り、当該座標位置に描画することを特徴と
する液晶表示制御装置。1. Display signal generation means, coordinate detection signal generation means, and signal switching means, wherein the display signal from the display signal generation means and the coordinate detection signal from the coordinate detection signal generation means are switched between the display signal from the display signal generation means and the coordinate detection signal from the coordinate detection signal generation means. In a liquid crystal display control device that sends display electrodes to a liquid crystal display device that also uses coordinate position detection while appropriately switching means, and draws content sent by a display signal at a coordinate position detected by a coordinate detection signal,
A means for dividing one frame into a plurality of parts by time division to provide a plurality of divided display periods, a divided display end detection means for detecting the end of each divided display period, and switching the signal switching means each time the end of each divided display period is provided. A liquid crystal display control device characterized by sending a coordinate detection signal to the liquid crystal display device and drawing at the coordinate position.
手段とを有し、上記表示信号生成手段からの表示信号と
上記座標検出信号生成手段からの座標検出信号とを、表
示用電極を座標位置の検出にも用いる液晶表示装置へ送
り、座標検出信号で検出された座標位置に表示信号で送
られてくる内容を描画する液晶表示制御装置において、
表示信号と座標検出信号とを周波数分割してこれらを弁
別する手段を備え、周波数分割した表示信号と座標検出
信号とを同時に上記液晶表示装置へ送り、液晶表示と座
標検出とを同時に行い描画することを特徴とする液晶表
示制御装置。2. A display signal generating means and a coordinate detection signal generating means, wherein the display signal from the display signal generating means and the coordinate detection signal from the coordinate detection signal generating means are used to set the display electrode to a coordinate position. In a liquid crystal display control device that draws the content sent as a display signal at the coordinate position detected by the coordinate detection signal,
A display signal and a coordinate detection signal are provided with a means for frequency-dividing and discriminating them, and the frequency-divided display signal and coordinate detection signal are simultaneously sent to the liquid crystal display device, and liquid crystal display and coordinate detection are simultaneously performed and drawn. A liquid crystal display control device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3076458A JPH04310995A (en) | 1991-04-09 | 1991-04-09 | Liquid crystal display controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3076458A JPH04310995A (en) | 1991-04-09 | 1991-04-09 | Liquid crystal display controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04310995A true JPH04310995A (en) | 1992-11-02 |
Family
ID=13605715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3076458A Pending JPH04310995A (en) | 1991-04-09 | 1991-04-09 | Liquid crystal display controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04310995A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07306397A (en) * | 1994-03-16 | 1995-11-21 | Toshiba Corp | Display device and liquid crystal display device |
| US5638089A (en) * | 1993-12-24 | 1997-06-10 | Sharp Kabushiki Kaisha | Coordinative detecting methods and apparatus for liquid crystal display unit and liquid crystal integral type tablet |
| JP2012059265A (en) * | 2010-09-08 | 2012-03-22 | Lg Display Co Ltd | Display device with touch sensor and driving method thereof |
| WO2012137800A1 (en) * | 2011-04-08 | 2012-10-11 | シャープ株式会社 | Display device, method for driving same, and electronic apparatus |
| JP2013076795A (en) * | 2011-09-30 | 2013-04-25 | Japan Display West Co Ltd | Display unit, display method, and electronic system |
| JPWO2013018736A1 (en) * | 2011-07-29 | 2015-03-05 | シャープ株式会社 | Display device |
| JP2015130208A (en) * | 2015-04-15 | 2015-07-16 | 株式会社ジャパンディスプレイ | Display apparatus, drive circuit, driving method and electronic apparatus |
| US9588631B2 (en) | 2011-10-12 | 2017-03-07 | Japan Display Inc. | Display apparatus, drive circuit, driving method and electronic apparatus |
-
1991
- 1991-04-09 JP JP3076458A patent/JPH04310995A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5638089A (en) * | 1993-12-24 | 1997-06-10 | Sharp Kabushiki Kaisha | Coordinative detecting methods and apparatus for liquid crystal display unit and liquid crystal integral type tablet |
| JPH07306397A (en) * | 1994-03-16 | 1995-11-21 | Toshiba Corp | Display device and liquid crystal display device |
| US9606655B2 (en) | 2010-09-08 | 2017-03-28 | Lg Display Co., Ltd. | Display device having touch sensor embedded in pixel array and method of driving the same |
| JP2012059265A (en) * | 2010-09-08 | 2012-03-22 | Lg Display Co Ltd | Display device with touch sensor and driving method thereof |
| US11494030B2 (en) | 2010-09-08 | 2022-11-08 | Lg Display Co., Ltd. | Display device having touch sensor and method of driving the same |
| WO2012137800A1 (en) * | 2011-04-08 | 2012-10-11 | シャープ株式会社 | Display device, method for driving same, and electronic apparatus |
| JP5296273B2 (en) * | 2011-04-08 | 2013-09-25 | シャープ株式会社 | Electronic device and timing control method thereof |
| US8866783B2 (en) | 2011-04-08 | 2014-10-21 | Sharp Kabushiki Kaisha | Display device, method for driving same, and electronic apparatus |
| JPWO2013018736A1 (en) * | 2011-07-29 | 2015-03-05 | シャープ株式会社 | Display device |
| JP2013076795A (en) * | 2011-09-30 | 2013-04-25 | Japan Display West Co Ltd | Display unit, display method, and electronic system |
| US8878802B2 (en) | 2011-09-30 | 2014-11-04 | Japan Display West Inc. | Display unit, display method, and electronic system |
| US9588631B2 (en) | 2011-10-12 | 2017-03-07 | Japan Display Inc. | Display apparatus, drive circuit, driving method and electronic apparatus |
| US9946387B2 (en) | 2011-10-12 | 2018-04-17 | Japan Display Inc. | Display apparatus, drive circuit, driving method and electronic apparatus |
| US10409409B2 (en) | 2011-10-12 | 2019-09-10 | Japan Display Inc. | Display apparatus, drive circuit, driving method and electronic apparatus |
| US11009984B2 (en) | 2011-10-12 | 2021-05-18 | Japan Display Inc. | Display device |
| US11526224B2 (en) | 2011-10-12 | 2022-12-13 | Japan Display Inc. | Display device with display and detection periods that share the drive electrode |
| US11960672B2 (en) | 2011-10-12 | 2024-04-16 | Japan Display Inc. | Display device with specific number of pulses of a drive signal applied during a detection |
| JP2015130208A (en) * | 2015-04-15 | 2015-07-16 | 株式会社ジャパンディスプレイ | Display apparatus, drive circuit, driving method and electronic apparatus |
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